JPS5998904A - Sand scattering apparatus for athletic field made of artificial turf - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sand scattering device used particularly when finishing an athletic field made of sand-containing artificial grass, which is constructed by filling dry sand into the grass grains.

In general, an artificial lawn is made of flat pile threads made of synthetic resin such as polyamide or polyurethane, which are flocked onto a backing fabric. In this case, the grass grains are filled with sand in order to approximate natural grass as closely as possible in terms of its properties, such as buffering capacity, ability to prevent spikes from getting caught, and water absorption capacity. However, the natural grass that makes up the greens of the Corfu course is also filled with sand, but the natural grass on the greens is short and the grain is not very dense, so the spread sand is almost natural. The sand gets into the grain of the grass and can be easily spread evenly by simply rubbing the grass surface lightly with a broom-shaped flage. However, the pile threads of artificial grass are considerably longer than the length of natural grass and have a bulky structure, so it is light (just rubbing with a brush will not allow the spread sand to fill the grass grains evenly). It is extremely difficult to do so.

Therefore, an object of the present invention is to apply river sand to an athletic field made of artificial turf, which can uniformly adjust the sand field within the turf grain at the final finishing stage of the sand bowl, and then sprinkle and fill it with finishing dry sand. The goal is to provide equipment.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

FIG. 1 shows a schematic cross-sectional view of a sand spreading device constructed according to the present invention. This sand spreading device is equipped with a cart 1 that runs on an artificial lawn. In this embodiment, the trolley 1 has a traveling engine (not shown) and is configured to be self-propelled by the engine. It may be of. The cart 1 is equipped with a hopper 2 for storing sand. In this case, the hopper 2 is provided so as to straddle between both side plates of the truck 1, and is provided with a discharge port opened downward.

Although not shown, a shutter plate is actually provided in relation to the discharge port to control the degree of opening thereof.

The truck 1 has a belt conveyor 3 placed below the hopper 2. This belt conveyor 3 is a trolley 1
A pair of rows 24, 4 pivotally supported at the front and rear parts of the
and each row 24, 4 passing below the discharge port of hopper 2.
In this case, one of the rollers 4, 4 is operatively connected to the aforementioned motor (not shown) as a driving source.In this invention, The rotary brush 6 is disposed behind the belt conveyor 3 and moves together with the cart 1 while rotating on the artificial lawn. It is oriented in a direction perpendicular to the direction of movement of the truck 1, and is pivotally supported at the rear of the truck 1 via its rotating shaft 7 and a link arm 8 attached to it. This is a support shaft provided on the side, and 10.11 is a bearing hole of the link arm 8, which is bored so as to fit into the rotation shaft 7 and the support shaft 9. Also, according to this embodiment,
The rotating brush 6 is configured to be rotationally driven via a belt 13 by a driving means, for example a motor 12, mounted in the trolley 1. In this case, the rotating flange 6 is driven in a direction opposite to the moving direction of the truck 1, that is, if the truck 1 moves rightward in FIG. 1, it is rotated counterclockwise.

The rotating brush 6 is made of bristles made of palm hair, nylon, etc., which are stronger than the synthetic resin pile threads A constituting the artificial lawn.

Furthermore, in this embodiment, the link arm 8
A weight 14 is replaceably attached to the turret, so that the load applied to the rotating brush 6 on the artificial lawn can be changed.

Next, we will explain the operation of this sand spreading device, but this is about the final finishing stage of sanding. It is assumed that sand has been filled in advance.

First, dry sand is put into hopper 2. As this sand, borate mineral grains such as river sand, sea sand, crushed sand, etc. are most suitable, and the grain size is preferably about so-called borax size 5 to 8. Then, while running the cart 1 to the right in FIG. 1, the endless belt 5 of the belt conveyor 3 is moved counterclockwise +i in the same figure, and then the rotating brush 6 is preferably moved counterclockwise in the same figure by the motor 12. It is rotated at a circumferential speed faster than the moving speed of the cart 1. As a result, the sand stored in the hopper 2 is discharged from the endless belt 6 from its discharge port.
After being placed on top and carried to the rear of the trolley 1, it is spread onto the rotating flange 6 mentioned above. In this case, since the rotating brush 6 is rotated in the opposite direction to the moving direction of the trolley 1 as described above, the sand prefilled in the grass grain between each pile leader is moved forward, that is, 'T'. The surface of the sand is adjusted uniformly while being blown toward the trolley 1 side, and the sand spread from the belt conveyor 3 is placed on the tips of the bristles to fill the inside of the grass grain. In this way, the sand plain within the turf grains of the artificial lawn is formed to have a uniform thickness. In this connection, by selecting the weights 14 mentioned above, the sand bed itself can be changed. In other words, if a relatively light weight is used, the sand bed becomes thicker as shown in Figure 3, making the ball's bouncing characteristics faster.On the other hand, if a relatively heavy weight is used, the sand bed becomes thinner, as shown in Figure 4, and the ball bounces faster. Bound characteristics become slower.

In the above embodiment, the rotary flange 6 is rotated by the motor 12, but it is also possible to rotate the rotary flange 6 using the traveling motor of the truck 1.

Furthermore, a mechanism for rotating the rotating brush 6 in forward and reverse directions is added, so that the rotating brush 6 is rotated in the same direction as the moving direction of the cart 1 during the basic stage of sand filling, thereby increasing the degree of filling of the grass grains with sand.

The rotary brush 6 may be rotated in the opposite direction during the final finishing stage of sanding.

As is clear from the description of the embodiments described above, according to the present invention, when sand is spread on an artificial lawn that is considerably longer than a natural lawn and has a bulky structure, the sand is uniformly adjusted. The sand can be efficiently filled into the turf grains, and is extremely useful in constructing an artificial turf athletic field.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view schematically showing a sand spreading device according to the present invention, FIG. 2 is a perspective view showing a rotating brush portion of the device, and FIGS. 3 and 4 are sand spreading devices using different weights. It is an explanatory view showing an example of construction in which .

Claims (2)

[Claims] (1) A device used for finishing an athletic field made of sand-containing artificial grass, which is made by filling dry sand into the turf grains, comprising a cart that moves over the artificial grass, and a device mounted on the cart. A hopper for storing sand, a belt conveyor that conveys the sand discharged from the hopper to the rear in the traveling direction of the trolley and sprinkles it on the artificial lawn from its terminal end, and a rotating brush connected to the rear part of the cart so that its one-rotation axis is perpendicular to the traveling direction of the cart at the falling position; and a rotating brush drive that rotates the rotating brush in a direction opposite to the traveling direction of the cart. means for spreading sand on an athletic field made of artificial turf, characterized in that sand is poured while adjusting the level of the sand field that has been filled in advance within the turf by rotating the rotary flange in the opposite direction. Device. (2) An artificial grass sports stadium river sand spreading according to claim 1, characterized in that a weight for adjusting the level of the sand bed is replaceably attached to the rotating brush. Device.